As I've been rather delinquent in writing up these updates, this is a bumper instalment, two services for the price of one. Lucky you!

At 160k the service was just the regularly refreshed items; oil, air filter, oil filter and cabin filter. Business as usual with the oil, Castrol Edge that I get at a good rate from Costco, and the filters were all EuroCarParts sourced.

Read on to find out why Castrol Edge is no longer business as usual.



After 16,000 miles the oil was looking decidedly worse for wear.

Used BMW E46 330d oil

As was the air filter, which was restricting majority of a tree and a small bird from getting into the engine.

Old vs New BMW E46 330d Air Filter


Luckily, Henry was on hand to clear things up. Using a little AutoGlym Vinyl and Rubber Care the intake, engine cover and cabin filter cover were looking much more like it.


AutoGlym Vinyl and Rubber Care Henry Vacuum Cleaner

That concludes the first service, fast forward one year for the next. Business is unusual this time in regards to the oil, after receiving a sign from the automotive gods (Costco didn't have any oil), I swapped out the regular Castrol Edge for Valvoline SynPower. I also managed to source an elusive vortex type oil breather filter, which Sytner Coventry said wasn't available any more...Cotswold Hereford BMW managed to source it just fine though. To round off this bumper service I replaced the fuel filter as well as the usual oil, air and cabin filters.



Anyway on with the show, whilst the oil was draining I got on with removing the oil breather filter. It's not that much more involved than replacing the air filter, which it sits next to, just a bit more fiddly to get it out. I also found you need to undo the coil pack rail to give you some wiggle room.



You can see below the old loo roll type on the left and the vortex on the right, and then the full vortex assembly underneath.

E46 Oil Breather Filter Loo Roll TypeE46 Vortex Oil Breather Filter

E46 Vortex Oil Breather Filter


Using the supplied BMW seal I got the new filter in and secured, and all other filters swapped too. 

Job done.

I did promise more info on the reason why Castrol Edge is no longer my go to oil, so here goes. It was immediately evident on start up that the engine ran smoother with the Valvoline oil, the note of the engine was quieter and just generally improved. The test drive re-enforced my opinion, the car was smoother and pulling better, quite surprising with just a brand change. My findings were then backed up with factual science when my girlfriend noticed the difference as well.

Result.